Nut-lock.



J. GRIMMER.

NUT LOOK.

APPLICATION FILED mum, 1909.

Patented Sept. 21, 1909.

QZAJESQQa [714/6 mid?" all parts all as will be ii-iris srrg a wsr JOSEPH GBIMMER, OF GRIFFITH. INEIANA.

To all "whom it may concern:

"1B3, it known that i, Josurn- GRIMMER, a citizen of the United States, residing at Grill'lth, in the county of. Lake and State of Indiana, have invented certain newand useful'improvements in Nut-Locks, of which the following is a specification. l /iy invention relates to nut locks and the object of my invention. is to provide a device of the character mentioned which will be adapted to etfectually and positively lock a nut upon a bolt against all possiblereverse movement thereon.

A further object is to provide a device of such character which will be of simple construction, hence of low cost to manufacture.

Other objects will appear hereinafter.

With these objects in view my invention consists generally in a bolt provided "with,

right and left-hand threads, the right-hand threaded portion being adapt-ed to receive a main nut the outer'end surface of which is provided with a plurality of radial notches. My invention further consists in a lock nut adapted to be threaded upon the left-hand threaded portion of said bolt, said lock nut being provided with detachable means projecting from the inner end surface thereof adapted to engage the notches provided in said main nut, thereby preventing relative movementof the latter.

My invention further consists in certain details of construction and arrangement of hereinafter fully described and particularly pointed out in the claim.

h ly'invention will be more readily understood. by reference to the accompanying drawings formin a partof this specification, and in whic Figure 1 is a side elevation of my improved nut lock showing the application thereof, Fig. 2 is a bottom plan view thereof, Fig. 3 is a perspective View of the main nut employed in conjunction with my locking device, Fig. 4 is an end elevation of the lock nut embodied in my invention, and Fig. 5 is a transverse section, thereof taken on the line a: w of Fig. 4.

Referring now to the drawings 1 indicates a bolt comprising the head 2 and the shank The rearward portion 4 of the latter is provided with right-hand threads, the forward portion 5 thereof, which is of reduced diame-' i 81, being provided with left-hand threads.

Specification of Letters Patent. I Application filed March 8. 1909.

ings. four in number.

and so that the-spring 11 cannot drop 7 be readily $eria1 No. @2126.

nut 6 in the outer end portion 7 of which is provided a plurality of radially extending notches 8, preterably,

as shown in the draw- "lhreaded upon the bolt-portion 5 is the locking nut 9 rear wardly obliquely projecting from the inner end surface 10 of which is a leaf ring member 11 detachably secured in said nut. ln order to effect such attachment of said spring member to said nut I provide the inner threaded surface of the latter with an angular slot 12 in which is adapted to be snugly received the angularly formed rearu-"ard end portion of said sp. 'ng member 11, such con tion obvic pern'iitting of the ready an or detachment from said nut of said spring member. The notch 12 is tortuous in form, as shown in Fig. 5, from the notch outwardly from face 10, but may only be inserted or removed through the central opening of the nut. It will be noted that by this arrangement the spring 11 may inserted in its holding notch 12 from its bolt but when the locknut is free that when said lock nut with its bolt the threads of the boltform a wall to prevent remoX- al of the spring. This furnishes a simple, economical, and safe means for securing the spring 11 in position. Said spring member is of such a form that the outer or exteriorly projecting extremity 13 thereof is adapted when the nut 9 is threaded upon the boltportion 5, the main nut 6 being in position upon the bolt portion a, to engage the notches 8 provided in the outer end surface of the last named nut, as clearly shown in Fig. 1, thereby obviously locking the same against reverse movemen Said spring member so locks the nuts 6 and 9 thatthe same cannot turn in opposite directions, and as one is held by righthand threads and the other is held by left-hand threads it is evidently impossible for either to be unscrewed or removed from the bolt until the spring member is released from engagement with the notches provided in the main nut. In order to remove either nut, a pointed tool or other instrument may be employed, the extremity thereof being inserted between the adjacent surfaces of the nut 6 and the spring member 11, in which event the latter may be forced out of engagement with the notches provided in said nut, thereis in engagement by obviously permitting of the removal of the lock nut, and subsequently of the removal of the main nut While I have shown what-I deem to be the preferable formof my invention, I do to be limited thereto, as there not wish might be various changes made in the details of construction and arrangement of parts without departing from the spirit of my invention comprehended within the appended claim.

Having described my invention What I claim as new and desire to secure by-Letters Patent is: a

In a nut lock the combination with a bolt having an inner larger and outer smaller portion oppositely threaded, of a threaded nut adapted to engage the inner threaded bolt' and locking means i into the threaded opening in 'the nut ted the 2Q ffor (slaid nuts com one o sai nuts openmg' an extending but part way through the nut, engaging spring inserted in said notch and 25 notches on the meeting face of the other nut adapted to engage said spring, substantially as specified. I o

In testimony whereof I have signerl m'y name to this specification in the presence of 3 two subscribing witnesses.

JOSEPH, GRIMMER.

portion of the belt; a threaded nut ada to engage the outer threaded portion 0' rising a notch in "Witnesses JosHUAR. H. Po'r'rs, J .\NET E. HOGAN. 

